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(int_reg_class_contents): Make unsigned to avoid signed integer overflow. 

(init_reg_sets): Avoid signed integer overflow.

From-SVN: r3411
This commit is contained in:
Richard Stallman 1993-02-02 22:25:11 +00:00
parent b670485b6a
commit 089e575bb0
1 changed files with 5 additions and 5 deletions
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10
gcc/regclass.c
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@ -115,14 +115,14 @@ int reg_alloc_order[FIRST_PSEUDO_REGISTER] = REG_ALLOC_ORDER;
HARD_REG_SET reg_class_contents[N_REG_CLASSES];
/* The same information, but as an array of ints. We copy from these
ints to the table above. This is done so that the tm.h files do
not have to be aware of the wordsize for machines with <= 64 regs. */
/* The same information, but as an array of unsigned ints. We copy from
these unsigned ints to the table above. We do this so the tm.h files
do not have to be aware of the wordsize for machines with <= 64 regs. */
#define N_REG_INTS \
((FIRST_PSEUDO_REGISTER + (HOST_BITS_PER_INT - 1)) / HOST_BITS_PER_INT)
static int int_reg_class_contents[N_REG_CLASSES][N_REG_INTS]
static unsigned int_reg_class_contents[N_REG_CLASSES][N_REG_INTS]
= REG_CLASS_CONTENTS;
/* For each reg class, number of regs it contains. */
@ -201,7 +201,7 @@ init_reg_sets ()
for (j = 0; j < FIRST_PSEUDO_REGISTER; j++)
if (int_reg_class_contents[i][j / HOST_BITS_PER_INT]
& (1 << (j % HOST_BITS_PER_INT)))
& ((unsigned) 1 << (j % HOST_BITS_PER_INT)))
SET_HARD_REG_BIT (reg_class_contents[i], j);
}